2014-04-01 14:13:16 [INFO] [STDERR] java.lang.ArrayIndexOutOfBoundsException: 6
2014-04-01 14:13:16 [INFO] [STDERR] at mrtjp.projectred.exploration.BlockOre.func_71858_a(Unknown Source)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.block.Block.func_71895_b(Block.java:549)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.RenderBlocks.func_94170_a(RenderBlocks.java:9045)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.RenderBlocks.func_78578_a(RenderBlocks.java:4885)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.RenderBlocks.func_78570_q(RenderBlocks.java:4418)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.RenderBlocks.func_78612_b(RenderBlocks.java:419)
2014-04-01 14:13:16 [INFO] [STDERR] at WorldRendererThreaded.updateRenderer(WorldRendererThreaded.java:155)
2014-04-01 14:13:16 [INFO] [STDERR] at WrUpdateThread.run(WrUpdateThread.java:116)
2014-04-01 14:13:16 [INFO] [STDERR] java.lang.IllegalStateException: Already tesselating!
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.Tessellator.func_78371_b(Tessellator.java:480)
2014-04-01 14:13:16 [INFO] [STDERR] at net.minecraft.client.renderer.Tessellator.func_78382_b(Tessellator.java:470)
2014-04-01 14:13:16 [INFO] [STDERR] at WorldRendererThreaded.updateRenderer(WorldRend

Crashed because YOUR world was messed up, but prevented via d8b18dd